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/*************************************************************************
* Copyright (C) 2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Test Suite. *
* *
* The Dimension Test Suite is free software; you can redistribute it *
* and/or modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Test Suite is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "tests.h"
void
dmnsn_paint_test_canvas(dmnsn_canvas *canvas)
{
static const size_t size = 8;
for (size_t y = 0; y < canvas->height; ++y) {
for (size_t x = 0; x < canvas->width; ++x) {
dmnsn_color a, b;
double n = 3.0*x/canvas->width;
if (x < canvas->width/3) {
a = dmnsn_red;
b = dmnsn_green;
} else if (x < 2*canvas->width/3) {
a = dmnsn_green;
b = dmnsn_blue;
n -= 1.0;
} else {
a = dmnsn_blue;
b = dmnsn_red;
n -= 2.0;
}
if ((x*y)%(2*size) < size) {
a = dmnsn_color_to_sRGB(a);
b = dmnsn_color_to_sRGB(b);
}
dmnsn_color color = dmnsn_color_gradient(a, b, n);
if ((x*y)%(2*size) < size) {
color = dmnsn_color_from_sRGB(color);
}
dmnsn_canvas_set_pixel(canvas, x, y, DMNSN_TCOLOR(color));
}
}
}
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